ref: 585365f5bbffae93eac3f1a4ba476aa0cab3f95d
dir: /sys/src/cmd/diff/diffdir.c/
#include <u.h> #include <libc.h> #include <bio.h> #include "diff.h" static int itemcmp(void *v1, void *v2) { char **d1 = v1, **d2 = v2; return strcmp(*d1, *d2); } static char ** scandir(char *name) { char **cp; Dir *db; int nitems; int fd, n; if ((fd = open(name, OREAD)) < 0) { fprint(2, "%s: can't open %s: %r\n", argv0, name); /* fake an empty directory */ cp = emalloc(sizeof(char*)); cp[0] = 0; return cp; } cp = 0; nitems = 0; if((n = dirreadall(fd, &db)) > 0){ while (n--) { cp = erealloc(cp, (nitems+1)*sizeof(char*)); cp[nitems] = emalloc(strlen((db+n)->name)+1); strcpy(cp[nitems], (db+n)->name); nitems++; } free(db); } cp = erealloc(cp, (nitems+1)*sizeof(char*)); cp[nitems] = 0; close(fd); qsort((char *)cp, nitems, sizeof(char*), itemcmp); return cp; } static int isdotordotdot(char *p) { if (*p == '.') { if (!p[1]) return 1; if (p[1] == '.' && !p[2]) return 1; } return 0; } void diffdir(char *f, char *t, int level) { char **df, **dt, **dirf, **dirt; char *from, *to; int res; char fb[MAXPATHLEN+1], tb[MAXPATHLEN+1]; df = scandir(f); dt = scandir(t); dirf = df; dirt = dt; while (*df || *dt) { from = *df; to = *dt; if (from && isdotordotdot(from)) { df++; continue; } if (to && isdotordotdot(to)) { dt++; continue; } if (!from) res = 1; else if (!to) res = -1; else res = strcmp(from, to); if (res < 0) { if (mode == 0 || mode == 'n') Bprint(&stdout, "Only in %s: %s\n", f, from); df++; continue; } if (res > 0) { if (mode == 0 || mode == 'n') Bprint(&stdout, "Only in %s: %s\n", t, to); dt++; continue; } if (mkpathname(fb, f, from)) continue; if (mkpathname(tb, t, to)) continue; diff(fb, tb, level+1); df++; dt++; } for (df = dirf; *df; df++) free(*df); for (dt = dirt; *dt; dt++) free(*dt); free(dirf); free(dirt); }